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1)  steel cofferdam
钢吊箱
1.
Design of the steel cofferdam of Shawan super Bridge and its construction;
沙湾特大桥钢吊箱围堰的设计与施工
2.
Comparison between the steel cofferdam and concrete cofferdam of one pipe cap construction
某承台施工钢吊箱和混凝土套箱方案比较
3.
This article introduces three outstanding innovations:Utilization of steel casing to establish a construction platform for Sutong Bridge s super-large and deep-pile groups;Permanent collision facilities consisting of collision structure and 5 000 ton steel cofferdam which is lowered as a whole;Permanent scour protection.
介绍了苏通大桥超大深水群桩基础利用工程钢护筒搭设施工平台、5000t承台钢吊箱整体同步沉放及其与防船撞结构相结合构成永久防船撞设施、永久冲刷防护等三项技术创新;提出了特大型桥梁基础工程经济合理的设计方案和安全可靠的施工法;阐明了理念创新和技术集成对大型复杂工程建设的重要性。
2)  steel suspension box
钢吊箱
1.
Structural design and construction control of single-wall steel suspension box with bottom;
单壁有底钢吊箱的结构设计与施工控制
2.
Construction Technology and Application of Steel Suspension Box for Underwater PHe-cap;
浅述水中承台钢吊箱施工技术及应用
3.
Combined with practical engineering,the author introduces the design and construction elements of deepwater high-rise pile cap foundation,and illustrates it from the construction of steel temporary bridge,construction of above-water operating platform and bored cast-in-situ pile,and construction of steel suspension box,in order to offer a reference for similar engineering.
结合工程概况,介绍了深水高桩承台基础的设计及施工要点,着重从钢便桥修建、水上作业平台及钻孔灌注桩施工、钢吊箱施工等方面进行了阐述,从而为同类工程提供了参考。
3)  steel boxed cofferdam
钢吊箱
1.
11 of Zhongxian Changjiang River Highway Bridge was implemented by the combined method of floating platform and steel boxed cofferdam.
忠县长江公路大桥11号主墩基础施工采用浮式平台与钢吊箱相结合的方法,施工技术新颖,工序转换快捷、安全。
2.
The steel boxed cofferdam for the south pylon pier footing of Sutong Bridge is designed in shape of dumbbell and is totally around 5 800 t in weight.
苏通大桥南主塔墩钢吊箱呈哑铃形,总重量约5 800 t,其竖向刚度大,吊点多且距离近,下放控制难度极大。
3.
With reference to several construction exemplars of the steel boxed cofferdams used for piers in sea, Donghai Bridge close to island side, the key points of design and construction of the cofferdams used in marine environment are presented.
结合东海大桥近岛段海上墩钢吊箱围堰的施工实例,介绍在海上施工环境中钢吊箱设计与施工要点,在没有大型吊装设备的情况下为海上进行大型吊箱围堰的施工提供施工方法和技术。
4)  steel hoisting box
钢吊箱
1.
The construction of bearing platforms with high piles for Sanmenjiang Bridge in Liuzhou being taken as an example,it introduces design and construction of steel hoisting box cofferdams with tensile and compressive columns,including design scheme,work principle,construction technology,and construction gist of steel hoisting box cofferdams as well as the problems to be noticed in the construction.
以柳州市三门江大桥高桩承台施工为例,介绍拉压柱式钢吊箱围堰的设计与施工,从钢吊箱围堰的设计方案、工作原理、施工工艺及施工要点等方面,对钢吊箱围堰施工中的注意事项进行了阐述。
2.
IThe paper states the manufacture and construction method of steel hoisting box cofferdam of Sanmenjiang Bridge in Liuzhou City, including the introduction of hoisting box structure, processing of hoisting box, splicing of hoisting box, subsidence of hoisting box, sub- sealing concrete construction etc.
叙述了柳州市三门江大桥钢吊箱围堰的制作与施工方法,包括吊箱结构介绍、吊箱加工、吊箱拼装、吊箱下沉、封底混凝土施工等。
5)  steel overhead bin
钢吊箱
1.
The construction of pile caps adopts the single-wall steel overhead bins,with the bottom sealing concrete as thick as 2.
襄渝Ⅱ线铁路流水河右线大桥4号主桥墩基础承台为深水高桩大体积混凝土承台,桥址处于汉江火石岩水库内,承台施工采用单壁钢吊箱施工,封底混凝土厚度为2。
2.
The pile caps are elevated in deep water and adopt the single-wall steel overhead bin-cofferdam construction.
0 m的钻孔灌注桩基础,承台为深水高桩承台,采用单壁钢吊箱围堰施工。
6)  steel hoist box
钢吊箱
1.
Shallow to talk the construction of Sanming city Dongxin 5 road big bridge high pile load desk steel hoist box
浅谈三明市东新五路大桥高桩承台钢吊箱施工
补充资料:45钢和40Cr钢调质的热处理工艺
45钢40Cr钢调质                         
    调质是淬火加高温回火的双重热处理,其目的是使工件具有良好的综合机械性能。
    调质钢有碳素调质钢和合金调质钢二大类,不管是碳钢还是合金钢,其含碳量控制比较严格。如果含碳量过高,调质后工件的强度虽高,但韧性不够,如含碳量过低,韧性提高而强度不足。为使调质件得到好的综合性能,一般含碳量控制在0.30~0.50%。

    调质淬火时,要求工件整个截面淬透,使工件得到以细针状淬火马氏体为主的显微组织。通过高温回火,得到以均匀回火索氏体为主的显微组织。小型工厂不可能每炉搞金相分析,一般只作硬度测试,这就是说,淬火后的硬度必须达到该材料的淬火硬度,回火后硬度按图要求来检查。 

工件调质处理的操作,必须严格按工艺文件执行,我们只是对操作过程中如何实施工艺提些看法。


   1、 45钢的调质
   45钢是中碳结构钢,冷热加工性能都不错,机械性能较好,且价格低、来源广,所以应用广泛。它的最大弱点是淬透性低,截面尺寸大和要求比较高的工件不宜采用。


   45钢淬火温度在A3+(30~50) ℃,在实际操作中,一般是取上限的。偏高的淬火温度可以使工件加热速度加快,表面氧化减少,且能提高工效。为使工件的奥氏体均匀化,就需要足够的保温时间。如果实际装炉量大,就需适当延长保温时间。不然,可能会出现因加热不均匀造成硬度不足的现象。但保温时间过长,也会也出现晶粒粗大,氧化脱碳严重的弊病,影响淬火质量。我们认为,如装炉量大于工艺文件的规定,加热保温时间需延长1/5。


   因为45钢淬透性低,故应采用冷却速度大的10%盐水溶液。工件入水后,应该淬透,但不是冷透,如果工件在盐水中冷透,就有可能使工件开裂,这是因为当工件冷却到180℃左右时,奥氏体迅速转变为马氏体造成过大的组织应力所致。因此,当淬火工件快冷到该温度区域,就应采取缓冷的方法。由于出水温度难以掌握,须凭经验操作,当水中的工件抖动停止,即可出水空冷(如能油冷更好)。另外,工件入水宜动不宜静,应按照工件的几何形状,作规则运动。静止的冷却介质加上静止的工件,导致硬度不均匀,应力不均匀而使工件变形大,甚至开裂。


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